EP0985052B1 - Methods and compositions to identify swine genetically resistant to f18 e. coli associated diseases - Google Patents

Methods and compositions to identify swine genetically resistant to f18 e. coli associated diseases Download PDF

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EP0985052B1
EP0985052B1 EP98923570A EP98923570A EP0985052B1 EP 0985052 B1 EP0985052 B1 EP 0985052B1 EP 98923570 A EP98923570 A EP 98923570A EP 98923570 A EP98923570 A EP 98923570A EP 0985052 B1 EP0985052 B1 EP 0985052B1
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swine
coli
resistant
gene
fucosyltransferase
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EP0985052A1 (en
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Brad T. Bosworth
Peter Voegeli
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Biotechnology Research and Development Corp
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Eidgenoessische Technische Hochschule Zurich ETHZ
Biotechnology Research and Development Corp
US Department of Agriculture USDA
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
    • C12N9/10—Transferases (2.)
    • C12N9/1048—Glycosyltransferases (2.4)
    • C12N9/1051—Hexosyltransferases (2.4.1)
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/04—Antibacterial agents
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
    • C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
    • C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q2600/00—Oligonucleotides characterized by their use
    • C12Q2600/156—Polymorphic or mutational markers

Definitions

  • compositions and non-invasive methods are provided for the identification of swine genetically resistant to E. coli related diseases, in particular, intestinal diseases associated with a strain of E. coli bacteria supplied with fimbriae F18.
  • DNA polymorphisms in swine alpha (1,2) fucosyltransferase ( FUT1 ) gene were identified that differentiate resistant from susceptible swine and provide a diagnostic test useful for swine breeders.
  • a major problem in breeding swine is to keep them disease-free. Intestinal disorders post weaning are a particular problem.
  • a limited number of serotypes of toxigenic Ecsherichia (E.) coli strains are the causative agents of oedema disease and postweaning diarrhea in swine which induce serious economic losses, especially among piglets aged 4 to 12 weeks, in swine breeding farms all over the world.
  • the typical clinical symptoms of oedema disease are neuroiogical signs such as ataxia, convulsions and paralysis.
  • oedema is typically present at characteristic sites such as eyelids and forehead, stomach wall and mesocolon.
  • the diseases are caused by Shiga-like toxin-II variant and enterotoxins LT, STa, STb, respectively, produced by E. coli that colonize the surface of the small intestine without affecting major morphological changes of the emerocytes (cells in the intestine).
  • Certain types of bacterial E. coli strains, F18, F4 (K88) are major, lethal villains in this regard.
  • "Oedema disease of pigs is an enterotoxaemia characterized by generalized vascular damage. The latter is caused by a toxin. Shiga-like toxin-II variant, produced by certain strains of E. coli .” (Bertschinger et al ., 1993).
  • the E. coli are distinguished by their pili types.
  • a group of adhesive fimbriae that are related are designated e.g ., K88 or F18 (Vögeli et al ., 1997).
  • ECF18R coli F18-receptor
  • SSC6 porcine chromosome 6
  • HAL halothane linkage group on chromosome 6.
  • the receptor for K88 E. coli is on chromosome 13.
  • the mechanism for resistance appears to be that intestinal borders in resistant animals are not colonized by E. coli, i.e ., the bacteria do not adhere to intestinal walls of resistant swine. Glycoprotein receptors in the brush border membrane of the intestine were shown to be responsible for the differences between adhesive and non-adhesive phenotypes related to some E. coli , therefore, the genotype of the host swine determines resistance.
  • the fimbriated bacteria also have been studied (WO 9413811).
  • a genetic "marker" locus is a coding or non-coding locus that is close to a genetic locus if interest, but is not necessarily The locus itself. Detectable phenotypes include continuous or discontinuous traits, e.g. restriction length fragment polymorphisms, production traits, bacterial adhesion traits, colorimetric or enzymatic reactions, and antibiotic resistance.
  • the S locus controls expression of The A and 0 blood group antigens. Swine homozygous recessive at the S locus do not express either A or 0 blood antigens.
  • the blood group H and Se loci have been mapped genetically and physically to human chromosome 19q13.3. This region is evolutionarily conserved, containing genes homologous to the HAL linkage group of genes in pigs.
  • the blood group H encoding gene is the so called FUT1 whereas the Se gene is equivalent to the FUT2 gene.
  • FUT1 determines H antigen expression in the erythroid cell lineage, whereas FUT2 regulates expression of the H antigen in the secretory epithelia and saliva.
  • Conservation of the FUT1 gene has been shown in lower mammals such as rat and rabbit, and The mRNA expression has been shown in rabbit brain tissue and rat colon.
  • blood groups and E. coli swine diseases include that carbohydrate structures of blood group antigens mediate the adhesion of some pathogenic microorganisms to host tissues, e.g. Heliobacter pylori adhere to Lewis b blood group antigens, and E. coli causing urinary tract infections adhere to blood group P substance.
  • Genes encoding glycosyltransferases that are responsible for the formation of the blood group specific carbohydrate structures therefore, represent candidate genes for the control of bacterial colonization by the host. The localization of these genes is in the same chromosomal region as The locus responsible for adhesion/non-adhesion of F18 positive E. coli in The swine small intestine. Swine do not express blood group antigens A and 0 until after weaning, this is The same time that they become susceptible to disease caused by F18 E. coli .
  • compositions and non-invasive methods of the present invention provide detection and elimination of swine that are susceptible to E. coli associated diseases.
  • a non-invasive method for identifying a swine that is resistant to intestinal colonization by E. coli F18 includes the following steps: determining whether a genetic polymorphism associated with resistance tto colonization is in a biological sample from the swine; and inferring that the swine is resistant if the swine is homozygous for the polymorphism 1 .
  • the method is determining in a biological sample from the swine whether the nitrogen base at position 307 in the alpha (1,2) fucosyltransferase gene of the swine is only adenine or has guanine; and identifying the swine as resistant if the only nitrogen base at position 307 is adenine.
  • restriction fragment length polymorphisms are analyzed on a gel that separates them by molecular weight.
  • Restriction endonucleases are enzymes that reproducibly cut nucleic acid molecules at specific sites, resulting in nucleic acid fragments of different molecular weights, depending on the locations of the cuts.
  • the invention also relates to a method for breeding swine resistant to E. coli associated diseases by selecting for breeding swine that have a genetic polymorphism in the alpha (1,2) fucosyltransferase 1 gene that identifies them as swine that are resistant to E. coli related diseases; and breeding the selected swine.
  • An aspect of the invention is a DNA molecule which is polymorphic for the alpha (1,2) fucosyltransferase 1 gene in swine, in particular a sequence in accordance with FIG. 1.
  • Other aspects of the invention are molecules with nucleotide sequences complementary to that of FIG. 1, and polymorphic at resistance producing nucleotide positions.
  • An aspect of the invention is an isolated DNA molecule with a substitution of adenine for guanine in position 307. This molecule may also have a substitution adenine for guanine in position 857.
  • Other isolated DNA molecules of the present invention include those with a mutation at nucleotide position 229 of the sequence of FIG. 1, wherein the codon CTT is changed to TTT, encoding for the amino acid phenylalanine instead of leucine.
  • a mutation at nucleotide position 714 is from GAT ⁇ GAC, but there is no accompanying amino acid substitution in the encoded product.
  • Polypeptides encoded by the DNA molecules of the present invention and having alpha (1,2) fucosvltransferase activity are also aspects of the invention.
  • a molecular assay for detecting E. coli F18 receptors in swine is to (a) isolate DNA from porcine nucleated cells; (b) amplify the DNA in a polymerase chain reaction (PCR) using oligonucleotides as primers which are complementary to a DNA sequence of the porcine alpha (1,2) fucosyltransferase gene 1; (c) perform a restriction enzyme digest with at least one restriction enzyme e.g ., CfoI; (d) separate the resulting fragments by gel electrophoresis; and (e) determine the respective numbers and lengths of fragments on the gel; and (f) determine from the numbers and lengths of fragments of FUT1 , which F18 receptor genotype is present in the porcine cells.
  • PCR polymerase chain reaction
  • RFLP restriction length polymorphism analysis
  • a kit for detecting polymorphisms associated with E. coli F18 receptors uses oligonucleotides in separate containers which are complementary to a DNA sequence of the porcine alpha (1,2) fucosyltransferase gene 1 that distinguishes resistant from sensitive swine. The test can be performed on swine of any age.
  • the polymorphisms are also useful to develop drugs to treat swine that have E. coli -associated disease.
  • a mutated form of porcine alpha (1,2) fucosyltransferase could interfere with the normal enzyme, preventing it from producing the intestinal receptor for F18.
  • FIG. 1 show the nucleotide sequence ( FUT1 ) (below) and the predicted amino acid sequence (above) of the swine ⁇ 1 ⁇ 2 fucosyltransferase polymorphism of the present invention using the one-letter amino acide code.
  • Resistant pigs differ from sensitive pigs at the E. coli F18 receptor locus as identified by the polymorphic markers of the present invention.
  • the present invention provides non-invasive methods and compositions to distinguish with a high level of sensitivity and specificity, swine that are genetically susceptible to diseases associated with F18 E. coli infection from resistant swine.
  • a DNA polymorphism in the alpha (1.2) fucosyltransferase ( FUT1 ) gene was identified that differentiates resistant from susceptible swine.
  • the polymorphism arose by a mutation (change) in a nucleotide sequence leading to a new allele.
  • An allele is a condition of a gene. In a population there may be many alleles of a gene differing by nitrogen base substitutions, presumably caused by mutations in an ancestral DNA molecule.
  • the coexistence in a population of more than one allele is called a genetic polymorphism.
  • Loci at which more than one allele may exist as apparently stable components of a population is a polymorphic locus.
  • one of the polymorphic loci is at a low frequency in the population.
  • the resistant swine As determined from a biological sample, preferably blood, the resistant swine have a polymorphism in their genomes in which the only base detected at position 307 (see FIG. 1) in the nucleotide sequence is adenine, whereas the base in the same position in homozygous susceptible swine is guanine. Heterozygous swine will show both types of DNA and will be susceptible.
  • the polymorphism is a variation of a porcine gene sequence reported by Cohney et al ., 1996.
  • polymorphisms have been found in the alpha (1,2) fucosyltransferase 1 gene ( FUT1 ).
  • FUT1 fucosyltransferase 1 gene
  • a polymorphism that has a single nucleotide base substitution at position 307 was used to establish a close linkage between the fucosyltransferase gene and the S -system, the ECF18R locus and other loci of the HAL linkage group.
  • the detection of the close linkage of the mutation at FUT1 and ECF18R allowed a molecular test to be developed for the identification of E. coli F18 adhesion resistant, heterozygous (carrier) and homozygous susceptible pigs.
  • This diagnostic test identifies, with high sensitivity and specificity, pigs that are susceptible to oedema disease and postweaning diarrhea.
  • the incidence of the polymorphisms of the present invention differs among swine breeds. Vögeli, et a. (1997) presented frequencies of the M307 allele in 5 pig breeds from herds that were not related to one another.
  • the availability of the diagnostic test for the polymorphism of the present invention provides breeders with the opportunity to effectively eliminate the ECF18R susceptible allele from their swine herds, thereby eliminating a prerequisite for E. coli F18 bacterial causing oedema disease and postweaning diarrhea.
  • the present invention further includes nucleotide sequences that are variants of a sequence of the alpha (1,2) fucosyltransferase gene 1 representing the various polymorphisms at bp 307, and diagnostic molecular based kits to identif, polymorphisms in the alpha (1,2) fucosyltransferase gene.
  • ECF18R E. coli F18 receptor locus 5 cosmids and one genomic clone containing the gene were isolated containing the alpha (1,2) fucosyltransferase genes, FUT1 and FUT2 (Meijerink et al ., 1997), from a porcine genomic library. Mapping by fluorescence in situ hybridization placed all these clones in band q11 of porcine chromosome 6 (SSC6q11).
  • the nucleotide positions are numbered from ATG (encoding methionine).
  • the open reading frame (ORF) extends from there to the terminating codon, that is 1098 nucleotides in length. Nucleotides before and after this ORF may vary, e.g . as in FIG. 1.
  • Analysis of these mutations in 34 matings of Landrace families with 221 progeny showed close linkage with locus controllling resistance and susceptibility to E. coli F18 adhesion and colonization in the small intestine ( ECP18R ) and with the locus of the blood group inhibitor S . Therefore, the M307 nutation is a good marker for marker-assisted selection of E. coli F18 adhesion resistant animals.
  • the polymorphisms of the present invention are easily identified using PCR-RFLP tests.
  • One embodiment of the tests used a 160bp fragment of porcine alpha (1,2) fucosyltransferase 1 amplified using PCR with the following primers: 5'CCAACGCCTCCGATTCCTGT3' and 5'GTGCATGGCAGGCTGGATGA3' (Table 1).
  • Preferred PCR conditions for this embodiment are 25 cycles at the following times and temperatures: 94°C, 30 sec; 60°C, 45 sec; 72°C, 90 sec.
  • the amplified DNA from resistant swine was digested by the restriction enzyme Hgal, but was not digested by the restriction enzyme HinPI.
  • the amplified DNA from homozygous susceptible swine was digested by the restriction enzyme HinPI.
  • the amplified DNA from heterozygous susceptible swine was partially digested by both enzymes.
  • DNA was isolated from porcine nucleated cells according to standard procedures.
  • Direct sequencing of porcine FUT1 and FUT2 sequences and their flanking regions in animals of different ECF18R genotype (Bb, bb) resulted in the identification of two G ⁇ A transitions at positions 307 and 857 (termed M307 and M857 , respectively) of FUT1 ORF.
  • the M307 transition eliminates a restriction site for CfoI.
  • Amplification of DNA isolated from porcine nucleated cells was performed according to standard procedures with primers P6 and P11 (3 min at 95°C, 30 cycles of 30 sec at 95°C, 30 sec at 56°C and 30 sec at 72°C, followed by a 7 min final extension at 72°C) followed by CfoI digestion and separation on a 3% agarose gel resulted in a restriction fragment length polymorphism (RFLP).
  • RFLP restriction fragment length polymorphism
  • Example 2 Sensitivity and Specificity of an Assay using Alpha (1,2) Fucosyltransferase in Detecting Swine Resistant to F18 E. coli
  • Intestinal cells were purified by scraping the mucosal surface off the intestine, lysing the cells in a hypotonic EDTA solution and washing by centrifugation. The purified intestinal cell brush borders were incubated with F18 E. coli . This mixture was examined by phase contrast microscopy. This assay determined if swine were susceptible (intestinal samples had adhering bacteria) or resistant (intestinal samples had no adhering bacteria). The PCR-RFLP assay for the polymorphism correlated with the bacteria-intestinal cell binding assay in 53 of 53 resistant swine and 128 of 130 susceptible swine.
  • Two swine that were determined susceptible using the bacteria-intestinal cell binding assay were incorrectly predicted to be resistant using the PCR-RFLP assay.
  • Two of the six herds examined contained resistant pigs, while only one herd had porcine stress syndrome, demonstrating that the PCR-RFLP assay can identify disease resistant animals in animals that do not have porcine stress syndrome.
  • Cosmids ETHs1, -s2, -s3, -s4 and -s6 were identified after screening of the cosmid library with a FUT1 nucleotide probe obtained from porcine genomic DNA with primers P7 and P10 and were mapped by FISH and DISC-PCR to chromosome 6 in band q 11.
  • cosmid ETHs2 KspI subclones 940 bp and 6.2 kb in length were isolated, corresponding to the estimated length of hybriding KspI fragments on the Southern blot. The sequence results of both subclones were combined to yield a 1501 bp sequence, which was in agreement with results of direct sequencing of genomic PCR products.
  • the 1501 bp sequence contains an open reading frame (ORF) of 1098 bp corresponding to the human FUT1 ORF, with 82.3% nucleotide and 80.8% amino acid identity.
  • the ORF encodes a polypeptide.
  • Example 5 Identification fo a Porcine FUT2 and a Pseudogene FUTP
  • ETHs1 has one DNA fragment (2.7 kb) that hybridizes to FUT1 sequences, whereas ETHs3 has two (2.7 kb and 8.2 kb).
  • ETHs3 has two (2.7 kb and 8.2 kb).
  • Subcloning and partial sequencing of the 2.7 kb EcoR1 fragment of ETHs1 and -s3 confirmed that these two fragments are identifcal.
  • the sequence is highly similar to the human FUT2 but shows several changes in the NH 2 and -COOH terminal regions. These changes lead to frame shifts that are not compatible with a conserved ORF, therefore an assumption is that the sequence obtained from the 2.7 kb fragment represents a pseudogene ( FUT2P ).
  • the sequence of the subclones obtaiend represents a 1023 bp ORF and is 85% identical at the nucleotide- and 83% identical at the amino acid level to the human FUT2 sequence. Many differences in the NH 2 and -COOH terminal regions were observed between the porcine FUT2 sequence and the FUT2P sequence derived from the 2.7 kb fragment.
  • the predicted amino acid sequence corresponds to the partially determined amino acid sequence of the porcine Secretor enzymes (Thurin and Blaszcyk-Thurin. 1995).
  • the porcine FUT1, FUT2 and FUTP sequences obtained were submitted to GenBank and have accession numbers U70883, U70881 and U70882, respectively.
  • the FUT1 and FUT2 genes have highly homologous sequences. This has to be considered in, for example, primer development. Furthermore, FUT1 and FUT2 enzyme activity need to be differentiated in further studies.
  • DNA was isolated from porcine nuclated cells according to standard procedures. Direct sequencing of porcine FUT1 and FUT2 sequences and their flanking regions in animals of different ECF18R genotypes ( Bb, bb ) resulted in the iedntification of two G-A transitions at positions 307 and 857 (termed M307 and M857 , respectively) of the FUT1 ORF.
  • the M307 transition eliminates a restriction site for the enzyme CfoI.
  • Amplification of DNA isolated from porcine nucleated cells was performed according to standard procedures with primers P6 and P11 (3 min at 95°C, 30 cycles of 30 sec at 95°C, 30 sec at 56°C and 30 sec at 72°C, followed by a 7 min final extension at 72°C) followed by CfoI digestion and separation on a 3% agarose gel resulted in a restriction fragment length polymorphism (RFLP).
  • RFLP restriction fragment length polymorphism
  • the M857 mutation is a transition that eliminates an AciI site.
  • Primer PBEST was designed to mismatch two additional AciI sites at positions 866 and 872.
  • PCR with primers P7 and PBEST (3 min. at 95°C, 30 cycles of 30 sec at 95°C, 30 sec at 56°C and 30 sec at 72°C, followed by a 7 min final extension at 72°C) followed by AciI digestion enables PCR-RFLP analysis on a 3% agarose gel.
  • Homozygous M857 AA animals show a 174 bp fragment while amplification products of M857 GG animals show 136- and 38- bp fragments.
  • ECF18R b the oedema and postweaning diarrhea resistance allele
  • ECF18R B the oedema and postweaning diarrhea susceptibility allele
  • Table 4 shows that the distribution of FUT1 genotypes at nucleotide position 307 among ECF18R types was significantly different from the expected ratio under a hypothesis that the two are independent.
  • 118 were determined to have the genotype M307 A / A in the DNA-based test
  • One resistant animal had the genotype M307 A / G .
  • 130 were M307 A / G or M307 G / G .
  • the G-A changes at bp+307 and bp+857 of the alpha (1,2) fucosyltransferase gene 1 results in a predicted amino acid substitution of threonine (neutral-polar) instead of alanine (neutral-nonpolar) and glutamine (neutral-polar) instead of arginine (basic), respectively which may have functional consequences in the encoded product.
  • a C-T change at bp 229 results in an amino acid substitution of leucine (neutral-nonpolar) instead of phenylalanine (neutral-nonpolar).
  • Porcine genomic libraries were screened with either a porcine FUT1 probe obtained with primers P7 and P10 or a porcine FUT1 cDNA.
  • a procine genomic library constructed in SuperCos 1 (Stragene, La Jolla, Ca, USA), was screened with an ⁇ 32 P dATP labeled (Prime It II, Stratagene) FUT1 probe obtained from procine genomic DNA with primers P7 and P10.
  • After hybridization of replica filters at 42°C for 15h (50% formamide, 6 x SSC, 5 x Denhardt's, 0.5% SDS, 0.1 mg/ml Salmon Sperm) and washing twice at 65°C for 30 min. (1 x SSC, 0.1% SDS), positive colonies were identified after exposure (15h, -80°C) to X-ray film.
  • Cosmid clones ETHs1, ETHs2, ETHs3, ETHs4 and ETHs6 were subjected to fluorescence in situ hybridization (FISH) (Solinas Toldo, et al. 1993) or direct in situ chromosomal PCT (DISC PCR) on porcine metaphases. Metaphase chromosomes were Q-banded and photographed before hybridization. The probes were labeled by random priming using biotin-16-dUTP. Signal detection and amplification was performed using avidin-FITC and biotinylated anti-avidin. The chromosomes were counterstained with 4,6-diamidino-2-phenylindole, and the relative positions of the cosmids were determined as described by Solinas Toldo, 1993.
  • FISH fluorescence in situ hybridization
  • DISC PCR direct in situ chromosomal PCT
  • KspI-, EcoRI- and KspI/EcoRI digests of all cosmids were separated on a 0.8% agarose gel and transferred to a Hybond N nylon membrane (Meijerink et al ., 1997). This blot was hybridized with ⁇ 32 P dATP labeled porcine FUT1 PCR products (primers P6-P11 and P7-P10). Based on the autoradiographic signals, ETHs1, -s2 and -s3 were subjected to further subcloning into pBluescript SK- (Stratagene), and FUT sequences were determined from subclones.
  • Haplotype frequencies were calculated from the parental animals, in the Landrace families and from the 8 parental Large White animals which were haplotyped for ECF18R from progeny information. Tetrachoric correlations of ECF18R and mutations in FUT1 ( FUT1 / M307 ) (polymorphisms) were calculated on all Landrace and Large White progeny.
  • Southern blot analysis was performed of cosmids ETHs1, ETHs2 and ETHs3 after digestion with enzymes KspI, EcoRI and KspIEcoRI and separation of 0.8% agarose.
  • Hybridization with an ⁇ 32 PdATP labeled 5' FUT1 fragment results in the same hybridizing 940 bp band in both the KspI digest and the KpsI/EcoRI digest.
  • hybridization with a 3' FUT1 fragment (primers P7-P10) (Meijerink et al ., 1997) shows a 6.2 kb KspI band and a 1.1 kb KspI/EcoRI band.
  • Both the 5' and 3' FUT1 fragments hybridize to the same 4.6 kb EcoRI fragment. This indicates the presence of a KspI site in the FUT1 gene contained in cosmid ETHs2.
  • Cross hybridization of the 3' FUT1 fragment detects 2.7 kb and 8.2 kb bands, resulting in the identification of the FUT2 pseudogene (incomplete ORF) and the FUT2 gene sequences, respectively.
  • Detection of (A) the M307 G to A and (B) the M857 G to A mutation in the porcine FUT1 gene was achieved by restriction length polymorphism analysis, using various restriction enzymes. Digestion of amplified FUT1 fragments with CfoI (A) and AciI (B) results in a restriction fragment polymorphism (Meijerink et al ., 1997).
  • A) The M307 A / A genotype generates 328 and 93 bp restriction fragments while the M307 G / G genotype generates 93, 241 and 87 bp fragments and heterozygous M307 A / G genotypes shows all four fragments.

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EP98923570A 1997-05-20 1998-05-20 Methods and compositions to identify swine genetically resistant to f18 e. coli associated diseases Expired - Lifetime EP0985052B1 (en)

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EP03001366A EP1310570B1 (en) 1997-05-20 1998-05-20 Methods and compositions to identify swine genetically resistant to F18 E. Coli associated diseases
DE29824744U DE29824744U1 (de) 1997-05-20 1998-05-20 Zusammensetzungen zur Identifizierung von Schweinen, die genetisch gegen F18 E. Coli-assoziierte Krankheiten resistent sind

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US4718197P 1997-05-20 1997-05-20
US471811P 1997-05-20
US47181P 1997-05-20
PCT/US1998/010318 WO1998053102A1 (en) 1997-05-20 1998-05-20 Methods and compositions to identify swine genetically resistant to f18 e. coli associated diseases

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RU2204609C2 (ru) * 1997-05-20 2003-05-20 Биотехнолоджи Резёрч Энд Девелопмент Корпорэйшен СПОСОБ ИДЕНТИФИКАЦИИ СВИНЕЙ, РЕЗИСТЕНТНЫХ К КИШЕЧНЫМ ЗАБОЛЕВАНИЯМ, АССОЦИИРОВАННЫМ С Е.Сoli, СПОСОБ РАЗВЕДЕНИЯ СВИНЕЙ, РЕЗИСТЕНТНЫХ К КИШЕЧНЫМ ЗАБОЛЕВАНИЯМ, АССОЦИИРОВАННЫМ С E.Coli, ВЫДЕЛЕННАЯ ДНК-МОЛЕКУЛА (ВАРИАНТЫ), МОЛЕКУЛЯРНЫЙ АНАЛИЗ ДЛЯ ОБНАРУЖЕНИЯ РЕЦЕПТОРОВ Е.Сoli F-18 У СВИНЕЙ И НАБОР ДЛЯ ОБНАРУЖЕНИЯ РЕЦЕПТОРОВ Е.Сoli F-18
US6355859B1 (en) * 1997-05-20 2002-03-12 Biotechnology Research And Development Corporation Interactions between genotype and diet in swine that prevent E. coli associated intestinal disease
HU221664B1 (hu) * 1999-03-31 2002-12-28 MTA Állatorvostudományi Kutatóintézete Élő, szájon át adható Escherichia coli vakcina készítésére alkalmas törzs a sertések választási hasmenésének megelőzésére és a törzs előállítására alkalmas eljárás
GB0118549D0 (en) * 2001-07-30 2001-09-19 Pig Improvement Uk Ltd Methods
US7785778B2 (en) 2002-11-25 2010-08-31 University Of Copenhagen Porcine polymorphisms and methods for detecting them
BR0317329A (pt) 2002-12-31 2005-11-08 Mmi Genomics Inc Composições, métodos e sistemas para inferir traços bovinos
CN104982387B (zh) * 2015-05-25 2018-01-23 广东温氏食品集团股份有限公司 一种muc13和fut1基因的分子标记辅助选择方法
CN108348585B (zh) * 2015-09-02 2023-12-15 杜邦营养生物科学有限公司 糖苷水解酶及其在预防和/或治疗动物中的病原体感染中的用途
CN106480174B (zh) * 2016-09-14 2019-04-16 扬州大学 一种用于猪抗病育种的遗传分子标记方法和应用
CN108384865A (zh) * 2018-02-07 2018-08-10 扬州大学 Alpha菌毛基因在仔猪腹泻致病性大肠杆菌监测、鉴别中的应用

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NO996373D0 (no) 1999-12-21
DK0985052T3 (da) 2003-10-27
US6596923B1 (en) 2003-07-22
DE69832306T2 (de) 2006-06-01
DE985052T1 (de) 2002-01-17
JP3637420B2 (ja) 2005-04-13
ATE309392T1 (de) 2005-11-15
CN1314953A (zh) 2001-09-26
DK1310570T3 (da) 2006-02-13
HUP0103587A1 (hu) 2002-01-28
US6965022B2 (en) 2005-11-15
BR9809137A (pt) 2000-08-08
ES2248647T3 (es) 2006-03-16
NO996373L (no) 2000-02-15
ES2203958T3 (es) 2004-04-16
CA2290768C (en) 2008-01-15
WO1998053101A2 (en) 1998-11-26
JP2005058240A (ja) 2005-03-10
ATE246731T1 (de) 2003-08-15
AU737862B2 (en) 2001-08-30
JP3941956B2 (ja) 2007-07-11
US20020133836A1 (en) 2002-09-19
AU7583298A (en) 1998-12-11
DE69816987D1 (de) 2003-09-11
MXPA99011988A (es) 2004-05-21
AU7580798A (en) 1998-12-11
CZ298021B6 (cs) 2007-05-30
DE69832306D1 (de) 2005-12-15
PL364701A1 (en) 2004-12-13
CA2290768A1 (en) 1998-11-26
DE69816987T2 (de) 2004-07-08
CZ9904607A3 (cs) 2000-10-11
HK1040097A1 (zh) 2002-05-24
EP0985052A1 (en) 2000-03-15
RU2204609C2 (ru) 2003-05-20
NZ501886A (en) 2001-07-27
US7193072B2 (en) 2007-03-20
WO1998053102A1 (en) 1998-11-26
WO1998053101A3 (en) 1999-02-25
HUP0103587A3 (en) 2006-02-28
PT985052E (pt) 2003-11-28
PL195890B1 (pl) 2007-11-30
JP2001521401A (ja) 2001-11-06
US20020129395A1 (en) 2002-09-12

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